KR20170047826A - Camera lens module - Google Patents

Abstract

According to an embodiment of the present invention relating to an electronic device including a camera lens module, an electronic device (terminal) comprises: a base; a first flow portion receiving a lens assembly coupled to the base to flow in a plane perpendicular to an optical axis of the lens assembly; and a second flow portion disposed on a lower portion of the base, moving in an optical axis direction of the lens assembly, wherein the second flow portion is able to form a variable gap between the first and second flow portions through the movement. In addition, various other embodiments are able to be implemented.

Description

Camera lens module {CAMERA LENS MODULE}

Various embodiments of the present invention are directed to an image stabilization device of a camera lens module mounted on an electronic device.

In general, a camera captures an image of an object to form an image data, and records the image in a proper file format. If the camera shake or vibration due to peripheral vibration is reflected in the captured image as it is, the image quality deteriorates .

As a technique for improving the performance of the camera lens module, there is a technique for compensating for the shaking motion. The camera-shake correction technique is a technique for compensating for shaking on a subject due to vibration of a human body, such as a camera shake of a user, during shooting. Such a camera-shake correction can be performed, for example, by detecting vibration applied to an apparatus through a plurality of angular velocity sensors mounted on an electronic device such as a camera, and moving the lens or the image sensor according to the angular velocity and direction of the detected vibration Do.

In recent years, various image stabilization techniques have been developed to automatically correct camera shake. For example, a method of fixing the imaging position on the image sensor by driving and controlling the optical lens by an appropriate amount of movement corresponding to the camera shake can be considered. In this case, a VCM (Voice Coil Motor) actuator using an electromagnetic interaction between the magnet and the drive coil may be used to drive the optical lens.

In order to implement the camera shake correction function that improves the performance of the camera lens module, it is required to increase the camera shake correction angle. In order to increase the correction angle, the DC sensitivity should be increased by increasing the size of the driving source or decreasing the resonance frequency. However, the increase of the size of the driving source is not suitable for a camera lens module of a small and lightweight trend, and designing a fixed module with a low resonance frequency has a problem that it is very vulnerable to external shocks due to low restoring force and attracting force.

Therefore, various embodiments of the present invention are intended to provide a camera lens module which is equipped with an image stabilization function and is small in size, light weight, and capable of varying the resonance frequency.

According to various embodiments of the present invention, a camera lens module comprises: a base; A first fluid reservoir for receiving the lens assembly and coupled to the base to flow in a vertical plane to the optical axis of the lens assembly; And a second flow portion disposed under the base and moving in the optical axis direction of the lens assembly, wherein a gap that is variable between the first and second flow portions is formed through movement of the second flow portion . ≪ / RTI >

At least one magnet mounted on one of the base and the first fluid portion; And at least one yoke disposed to correspond to the magnet and mounted to the second fluid portion, wherein the magnet and the yoke are arranged such that the second flow portion corresponds to the first fluid portion or the base The magnetic force in the direction of the optical axis can be generated.

The driving unit may further include a driving unit disposed on one side of the base or the second moving unit and moving the second moving unit in the optical axis direction.

Further, by the driving of the driving unit, the optical axis direction back and forth motion of the second flow portion varies the gap between the first fluid portion and the second fluid portion, and thereby the first fluid portion and the second fluid portion The resonance frequency between the moving parts can be changed.

The cover unit may include at least one driving coil disposed to face the magnet. The cover unit may be disposed on the first moving unit to cover the upper side of the first moving unit.

In addition, at least two pairs of the magnets may be arranged symmetrically with respect to the optical axis.

Further, the at least one coil and the at least one magnet are disposed to face each other, and the driving force capable of flowing the first flow portion by the interaction of the driving coil and the magnet can be generated.

The attraction force of the magnet and the yoke, the DC sensitivity, and the amount of deflection by the gravity of the camera lens module can be varied according to the variation of the gap between the magnet and the yoke.

The second flow portion may include at least one yoke groove for receiving at least one yoke, and the centers of the yoke, the magnet, and the coils may be disposed in the same line.

The yoke groove may include a yoke hole in the center of the yoke groove to generate an interaction between the yoke and the magnet when the yoke is seated.

Further, the base may have a guide hole for guiding the yoke mounted in the yoke groove of the second flow portion to move in the optical axis direction, and the guide hole may be formed in a space in which the yoke groove can move left and right So that it can be formed larger than the yoke groove.

And at least one rod disposed to penetrate the base, wherein the at least one rod is capable of guiding the second fluid portion moving in the direction of the optical axis, and is disposed on the outer surface of the rod, And may include an elastic member that sets a range of a gap that varies between the magnet and the yoke as it moves.

And a flexible circuit board provided on the cover part and electrically connected to the driving part and supplying power.

The base, the first fluid portion, and the second fluid portion may be arranged in parallel along the side surface of the lens assembly.

The camera lens module according to the exemplary embodiment of the present invention has an effect that the gap between the magnet and the yoke in the module can be changed so as to improve the camera shake correction performance by adjusting the camera shake correction angle by varying the resonance frequency have.

The camera lens module according to the embodiment of the present invention may be designed to have a variable resonance frequency so as to cope with camera shake which is changed according to a photographing situation such as a still image / There is an effect that can be.

In addition, the camera lens module according to the embodiment of the present invention has an effect of realizing a camera-shake locking function by increasing the variable resonance frequency to a certain level or more.

1 is a cross-sectional view illustrating a main part of a camera lens module according to an embodiment of the present invention.
2 is a cross-sectional view illustrating the structure of a base and a second flow portion of a camera lens module according to an embodiment of the present invention.
3 is an exploded perspective view showing a main part of a camera lens module according to an embodiment of the present invention.
4 is a top view of the second flow portion of the camera lens module according to an embodiment of the present invention, from above.
5 is a schematic view showing a correlation between a magnet and a yoke in a camera lens module according to an embodiment of the present invention.
6 is a top view of a camera lens module illustrating a deflection amount of a camera lens module by gravity according to an embodiment of the present invention.
7 is a cross-sectional view illustrating a camera lens module in which a yoke moves close to a magnet according to an embodiment of the present invention.
8 is a cross-sectional view illustrating a camera lens module in which a yoke moves away from a magnet according to an embodiment of the present invention.
9 is a graph illustrating the characteristics of the shaking motion according to the gap between the magnet and the yoke according to the embodiment of the present invention.
10 is a cross-sectional view illustrating a position of a yoke for realizing camera-shake locking of a camera lens module according to an embodiment of the present invention.
11 is a cross-sectional view illustrating a position of a yoke for camera-shake still image pickup of a camera lens module according to an embodiment of the present invention.
12 is a cross-sectional view illustrating the position of a yoke for photographing a shaking motion of a camera lens module according to an embodiment of the present invention.

Hereinafter, various embodiments of the present document will be described with reference to the accompanying drawings. It should be understood, however, that this invention is not intended to be limited to the particular embodiments described herein but includes various modifications, equivalents, and / or alternatives of the embodiments of this document . In connection with the description of the drawings, like reference numerals may be used for similar components.

In this document, the expressions "having," " having, "" comprising," or &Quot;, and does not exclude the presence of additional features.

In this document, the expressions "A or B," "at least one of A or / and B," or "one or more of A and / or B," etc. may include all possible combinations of the listed items . For example, "A or B," "at least one of A and B," or "at least one of A or B" includes (1) at least one A, (2) Or (3) at least one A and at least one B all together.

As used herein, the terms "first," "second," "first," or "second," and the like may denote various components, regardless of their order and / or importance, But is used to distinguish it from other components and does not limit the components. For example, the first user equipment and the second user equipment may represent different user equipment, regardless of order or importance. For example, without departing from the scope of the rights described in this document, the first component can be named as the second component, and similarly the second component can also be named as the first component.

(Or functionally or communicatively) coupled with / to "another component (eg, a second component), or a component (eg, a second component) Quot; connected to ", it is to be understood that any such element may be directly connected to the other element or may be connected through another element (e.g., a third element). On the other hand, when it is mentioned that a component (e.g., a first component) is "directly connected" or "directly connected" to another component (e.g., a second component) It can be understood that there is no other component (e.g., a third component) between other components.

As used herein, the phrase " configured to " (or set) to be "configured according to circumstances may include, for example, having the capacity to, To be designed to, "" adapted to, "" made to, "or" capable of ". The term " configured to (or set up) "may not necessarily mean" specifically designed to "in hardware. Instead, in some situations, the expression "configured to" may mean that the device can "do " with other devices or components. For example, a processor configured (or configured) to perform the phrases "A, B, and C" may be implemented by executing one or more software programs stored in a memory device or a dedicated processor (e.g., an embedded processor) , And a generic-purpose processor (e.g., a CPU or an application processor) capable of performing the corresponding operations.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the other embodiments. The singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art. The general predefined terms used in this document may be interpreted in the same or similar sense as the contextual meanings of the related art and, unless expressly defined in this document, include ideally or excessively formal meanings . In some cases, even the terms defined in this document can not be construed as excluding the embodiments of this document.

An electronic device according to various embodiments of the present document may be, for example, a camera or a wearable device, a smartphone, a tablet personal computer, a mobile phone, A video phone, an e-book reader, a desktop personal computer, a laptop personal computer, a netbook computer, a workstation, a server, a personal digital assistant ), A portable multimedia player (PMP), an MP3 player, and a mobile medical device. According to various embodiments, the wearable device may be of the accessory type (e.g., a watch, a ring, a bracelet, a bracelet, a necklace, a pair of glasses, a contact lens or a head-mounted-device (HMD) (E. G., Electronic apparel), a body attachment type (e. G., A skin pad or tattoo), or a bioimplantable type (e.g., implantable circuit).

In some embodiments, the electronic device may be a home appliance. Home appliances include, for example, televisions, digital video disc (DVD) players, audio, refrigerators, air conditioners, vacuum cleaners, ovens, microwaves, washing machines, air cleaners, set- Such as a home automation control panel, a security control panel, a TV box such as Samsung HomeSync ^TM , Apple TV ^TM or Google TV ^TM , a game console such as Xbox ^TM and PlayStation ^TM , , An electronic key, a camcorder, or an electronic frame.

In an alternative embodiment, the electronic device may be any of a variety of medical devices (e.g., various portable medical measurement devices such as a blood glucose meter, a heart rate meter, a blood pressure meter, or a body temperature meter), magnetic resonance angiography (MRA) Navigation systems, global navigation satellite systems (GNSS), event data recorders (EDRs), flight data recorders (FDRs), infotainment (infotainment) systems, ) Automotive electronic equipment (eg marine navigation systems, gyro compass, etc.), avionics, security devices, head units for vehicles, industrial or home robots, automatic teller's machines (ATMs) Point of sale, or internet of things (eg, light bulbs, various sensors, electrical or gas meters, sprinkler devices, fire alarms, thermostats, street lights, Of the emitter (toaster), exercise equipment, hot water tank, a heater, boiler, etc.) may include at least one.

According to some embodiments, the electronic device is a piece of furniture or a part of a building / structure, an electronic board, an electronic signature receiving device, a projector, Water, electricity, gas, or radio wave measuring instruments, etc.). In various embodiments, the electronic device may be a combination of one or more of the various devices described above. An electronic device according to some embodiments may be a flexible electronic device. Further, the electronic device according to the embodiment of the present document is not limited to the above-described devices, and may include a new electronic device according to technological advancement.

In addition, a camera lens module applied to the electronic device is a replaceable lens detachable to a camera. The camera lens module moves a lens or an image sensor positioned in front of the image sensor along the optical axis direction according to the distance to the subject, It is possible to provide an automatic focus adjustment function capable of acquiring a clear image from the image plane of the image sensor. In addition, it is possible to provide an image stabilization function that compensates for the shaking of the subject due to the vibration of the human body, such as the shaking of the user.

In the present embodiment, the camera lens module will be described with reference to a camera shake correction technique (OIS) used in an interchangeable lens, but the present invention is not limited thereto. For example, a camera used in a smart phone, The lens module 10 may be variously applied. In this embodiment, a camera lens module capable of changing the resonance frequency by changing the gap between the magnet and the yoke York will be described.

In this document, the term user may refer to a person using an electronic device such as a camera lens module or a device using an electronic device (e.g., an artificial intelligence electronic device).

1 is a cross-sectional view illustrating a main part of a camera lens module according to an embodiment of the present invention. 2 is a cross-sectional view illustrating the structure of a base and a second flow portion of a camera lens module according to an embodiment of the present invention. 3 is an exploded perspective view showing a main part of a camera lens module according to an embodiment of the present invention. 4 is a top view showing the second flow portion of the camera lens module from above, according to an embodiment of the present invention.

Referring to Figs. 1 to 4, the components of the electronic device including the camera lens module 10 will be described.

1 to 4, a camera lens module 10 according to an embodiment of the present invention includes a base 100, a first fluid unit 200, a second fluid unit 300, and a cover unit 400 .

The camera lens module 10 is implemented in an interchangeable lens, so that the user can stably capture an image of a desired subject without shaking due to a camera shake or ambient vibration of the photographer, and transmit the captured image to the inside of the camera.

The base 100 is disposed between the first fluid unit 200 and the second fluid unit 300 and provides a reference point when the first fluid unit 200 and the second fluid unit 300 are moved, (Not shown).

The base 100 has a center hole C including an optical axis O and at least one guide hole 101 at the periphery of the center hole C. [ In addition, it may include a driving part seating space 102 in which a driving part 500 for transmitting power to the second fluid part 300 may be mounted.

The center hole C of the base 100 is formed in a circular shape with respect to the central axis of the base 100 and may serve as a path of light provided to the lens assembly 210.

The guide hole 101 serves to guide a space in which the yoke 310 can move in the optical axis O direction of the lens assembly 210. The guide hole 101 has a shape that guides the space corresponding to the space in which the yoke 310 is mounted And structures. For example, in one embodiment of the present invention, the guide holes 101 are formed of four pieces and can be disposed at the same intervals and corresponding positions with respect to the center hole C, respectively. However, the present invention is not limited to the above-described number and arrangement of the guide holes 101, and it may be provided in various numbers or may be arranged at various positions necessary to prevent hand tremble which is to be achieved in the present invention.

 The driving part seating space 102 is disposed outside the base 100 and can provide a space for the driving part 500 to be seated. The driving unit 500 is disposed over the base 100 and the second fluid unit 300 and the driving unit seating space 102 may include the space of the second fluid unit 300.

In addition, the base 100 may have various structures including a shape such as a groove and a hole that can be coupled with the first and second fluid dynamic portions 200 and 300.

The first fluid part 200 receives the lens assembly 210 and is coupled to the upper part of the base 100 and configured to flow. For example, the first fluid flow unit 200 is configured such that the first fluid flow unit 200 flows in a plane (e.g., an XY plane) perpendicular to the optical axis O of the lens assembly 210, The camera shake correction operation can be performed.

The lens assembly 210 includes at least one lens and may be accommodated in the second fluid reservoir 300. The lens assembly 210 also moves in a plane perpendicular to the optical axis O as the second fluid 300 flows in a plane perpendicular to the optical axis O (e.g., XY plane) A correction operation can be performed.

The first fluid unit 200 may mount at least one magnet 220 on the periphery of the lens assembly 210.

The magnets 220 are assembled at positions facing each other with the driving coils 410 arranged at the upper portion and perform electromagnetic interaction to constitute a VCM (Voice Coil Motor) actuator, for example. Both ends of the driving coil 410 may be connected to a circuit board 420 for applying controlled driving power. The first fluid 200 may be driven in a plane (e.g., the X-Y plane) perpendicular to the optical axis O according to the electromagnetic interaction between the magnet 220 and the drive coil 410, and may perform a correction operation.

The first fluid 200 may include a lens mount 202 for receiving the lens assembly 210 and a magnetic mount 201 for mounting the at least one magnet 220.

The lens mount 202 may include a structure such as a step or the like at the periphery of the center hole C so that the lens assembly 210 can be securely coupled or supported and seated.

The magnet mounting part 201 may be disposed around the lens mounting part 202 and surround the magnet 220 so that the magnet 220 can be safely supported when the magnet mounting part 201 is seated. When the magnet 220 is seated on the magnet mounting portion 201, the upper side is opened so as to interact with the driving coil 410 disposed on the upper side, and the yoke 310 A magnet mounting hole 201a may be provided in the lower center portion.

For example, in an embodiment of the present invention, the lens seating portion 202 is disposed at the edge of the center hole C including the optical axis O, and the magnet seating portion 201 includes four magnets 220, And can be disposed at the same interval and corresponding positions with respect to the center hole C, as shown in FIG. Here, the centers of the driving coils 410 and the magnets 220 may be arranged on the same line, and may interact with each other.

The magnet mounting part 201 may be configured such that the upper surface thereof is opened and at least a part of the lower surface thereof is closed so that the magnet 220 can be seated and arranged from the upper side to the lower side. A portion of the lower surface of the magnet 220 mounted on the magnet mounting portion 201 is formed with a hole (seating hole 201a) so that the driving coil 410 or the yoke 310 can interact with each other. . However, the present invention is not limited to the number and arrangement of the above-mentioned magnet seating portions 201 according to one embodiment, but may be provided in various numbers or may be arranged at various positions necessary for preventing hand tremble that is to be achieved in the present invention. In the case of a structure in which the magnets 220 can be seated from the lower side to the upper side, the lower surface can be opened and the seating hole 201a can be formed on the upper surface. Also, And may be located at various locations.

The second fluid unit 300 is configured to be coupled to the lower part of the base 100 and to flow. For example, the second fluid unit 300 can move the second fluid unit 300 in the direction of the optical axis O of the lens assembly 210 according to the shaking of the user, thereby performing the camera-shake correction operation.

The second fluid unit 300 may mount at least one yoke on the periphery of the center hole C including the optical axis O. [

The yoke 310 is assembled at a position facing each other with the magnet 220 of the first moving part 200 disposed at the upper part of the yoke 310. As the gap g with respect to the magnet 220 is varied, And the resonance frequency f can be adjusted. An operation of correcting the shaking motion performed according to the variation of the resonance frequency f will be described later.

The second fluid unit 300 may include a yoke groove 301 for mounting the at least one yoke 310.

The yoke groove 301 is disposed at a peripheral portion around the center hole C and may be configured to surround the edge of the yoke 310 so that the yoke 310 can be securely supported when the yoke 310 is seated. When the yoke 310 is seated in the yoke groove 301, the yoke hole 301a may be formed on the upper side so that the upper side thereof is opened so as to interact with the magnet 220 disposed on the upper side. A yoke stopper 301b may be provided on the lower end of the yoke groove 301 so that the yoke is seated from the lower side to the upper side and the yoke 310 is not released downward.

For example, in one embodiment of the present invention, the yoke groove 301 is formed of four yokes 310 to accommodate four yokes 310, . Here, the center of the driving coil 410, the magnet 220, and the yoke 310 may be disposed on the same line, and may interact with each other.

The yoke groove 301 is formed by arranging the yoke 310 in a direction from the lower side to the upper side so that the size of the yoke hole 301a is adjusted to the yoke 310 so that the position of the yoke 310 is not changed by interaction with the magnet 220 310 and guide the edge of the yoke 310 so that the vertical movement and the lateral movement of the yoke 310 can be restricted. However, the present invention is not limited to the number and arrangement of the yoke grooves 301 according to one embodiment, and may be arranged in various numbers or in various positions necessary to prevent hand tremor that is to be achieved in the present invention.

The second moving part 300 is disposed at the center of the yoke center shaft 330 and can guide the second moving part 300 moving along the optical axis O. [ The yoke center axis 330 can help the second fluid section 300 to be safely driven from the center of the plurality of yoke grooves 301.

The cover part 400 is disposed on the first moving part 200 and covers the upper side of the camera lens module 10. For example, in a state where the respective driving devices such as the lens assembly 210, the base 100, the first fluid unit 200, and the second fluid unit 300 are coupled, Each component can be protected by closing all the open portions at the top except for the imaging opening (e.g., the center hole) for assembly 210.

At least one driving coil 410 may be mounted on the peripheral portion of the center hole C including the optical axis O disposed on the lower side of the cover portion 400. [

The driving coil 410 is assembled at a position facing the magnet 220 of the first moving part 200 disposed at the lower part and performs an electromagnetic interaction with the magnet so that a voice coil motor Respectively. Both ends of the driving coil 410 may be connected to a circuit board 420 for applying controlled driving power. The driving coil 410 is fixedly disposed on the lower end of the cover part 400 and the first moving part 200 on which the magnet 220 is mounted is moved along the optical axis (E.g., an XY plane) perpendicular to the optical axis O and can perform a correction operation. However, the present invention is not limited thereto, and the magnet 220 may be fixed and the driving coil 410 may be driven in a plane (e.g., the X-Y plane) perpendicular to the optical axis O,

The driving coils 410 may be at least one, and each of the driving coils 410 may be arranged to face each of the magnets 220 mounted on the first moving part. A flexible printed circuit board 420 may be provided at the periphery to apply electrical signals to the drive coils 410 and the drive coils 410 may be connected to the flexible printed circuit board 420 . The flexible printed circuit board 420 is provided with a hole sensor (not shown) for sensing a position of the flexible printed circuit board 420 and a lens assembly (not shown) accommodated in the first fluid unit 200 or the first fluid unit 200 210 can be detected. When the electric signal is applied to the driving coil 410 arranged to form a long axis in the first direction X, the first fluid 200 and the lens assembly 210 are moved in a plane perpendicular to the optical axis O When the electric signal is applied to the driving coil 410 which flows in the first direction X and is arranged to form a long axis in the second direction Y, the first fluid 200 and the lens assembly 210 are rotated, May flow in a second direction (Y) in a plane perpendicular to the optical axis (O). In this way, an electric signal is applied to at least one of the drive coils 410 according to the vibration of the user, such as camera shake, to flow the first fluid 200 and the lens assembly 210, It is possible to suppress and alleviate the image distortion and the like.

The cover unit 400 may include a drive coil receiving portion 402 for mounting the at least one drive coil 410 and may include a flexible printed circuit board (420).

The driving coil receiving portion 402 is disposed on the lower surface of the cover portion 400 around the center hole C so as to be securely supported and fixed when the driving coil 410 is seated. And may be configured to surround the edge of the coil 410. Further, when the drive coil 410 is mounted on the drive coil receiving portion 402, the lower side may be opened to interact with the magnet 220 disposed on the lower side.

For example, in one embodiment of the present invention, the driving coil seat 402 is formed of four pieces to accommodate the four driving coils 410, As shown in FIG. A pair of driving coils 410 arranged to form a long axis in the first direction X of the driving coil 410 are arranged parallel to each other so that the first moving part 200 and the lens assembly 210 So that the first flow portion 200 can flow in the first direction X in a plane perpendicular to the optical axis O. [ The driving coil 410 arranged to form a long axis in the second direction Y of the driving coils is disposed in parallel with the driving coil 410 so that the first moving part 200 and the lens assembly 210 move along the optical axis O In the second direction (Y) in a plane perpendicular to the first direction (Y). Here, the centers of the driving coils 410 and the magnets 220 may be arranged on the same line, and may interact with each other.

However, the present invention is not limited to the number and arrangement of the drive coils 410 according to one embodiment, and may be provided in various numbers or may be arranged at various positions necessary to prevent hand tremor which is to be achieved in the present invention.

A flexible printed circuit board 420 may be disposed on the cover 400 to apply electricity to the drive coil 410. The flexible printed circuit board 420 may be formed in a ring shape so as not to affect the center hole C including the optical axis O, like the shape of the components constituting the camera module.

The camera lens module 10 may further include a driving unit 500 capable of driving the second fluid unit 300, an elastic member 510 for compensating for the attraction force in the optical axis O direction, have.

The driving unit 500 is disposed at one side of the base 100 or the second moving unit 300 and provides a driving force that allows the second moving unit 300 to move back and forth in the optical axis O direction. The gap g between the first fluid 200 and the second fluid 300 may be controlled by a driving force of the driving unit 500 to increase the resonance frequency between the magnet 220 and the yoke 310 (f) can be varied to improve the hand shake correction performance. The driving unit 500 is provided to control the gap g and is connected to a DC connected to a shaft, a clip, a bracket, or the like for driving the second moving unit 300. For example, Or a step motor assembly or the like.

The driving unit 500 may include a driving cover 530 in addition to the above components. The drive cover 530 may be configured to surround the periphery of the drive unit 500 disposed in the base 100 or the second fluid unit 300 to protect the drive unit 500 from being damaged by an external impact.

The driving unit 500 is disposed over the base 100 and the second moving unit 300 and is disposed in contact with the edges of the base 100 and the second moving unit 300 . The driving cover 530 may be installed on the base 100 to protect the upper portion of the driving unit 500 and may include a second moving unit 300 to protect the lower portion of the driving unit 500. [ . However, it should be understood that the present invention is not limited to the number and arrangement of the driving units 500 according to one embodiment, and it is obvious that the present invention can be provided in various numbers or in various positions necessary for preventing hand tremble .

The elastic member 510 may be disposed inside the camera lens module 10 and may include at least one or more elastic members. The elastic member 510 is disposed between the magnet 220 and the yoke 310 when the second moving unit 300 moves upward and downward in the optical axis O direction by the driving unit 500 And can set the range of the maximum gap and the minimum gap.

For example, the elastic member 510 is disposed inside the base 100 and connected to the second fluid flow unit 300 through the rod 520 to guide the movement of the second fluid flow unit 300. When the gap g between the magnet 220 and the yoke 310 is minimized, the elastic member 510 is compressed to the maximum and may affect the magnitude and direction of the restoring force R described later. Also, when the gap between the magnet 220 and the yoke 310 is maximized, the elastic member 510 is pulled to the maximum, which may also affect the magnitude and direction of the restoring force R, which will be described later. The elastic member 510 may be formed of various members capable of realizing an elastic force by compression and tensile action such as a leaf spring and a coil spring and may be disposed on the outer surface of the rod 520 passing through the camera lens module 10 .

The rod 520 serves to guide the movement of tension or contraction when the elastic member 510 is stretched or contracted, and may be disposed inside the elastic member 510. The rod 520 may be provided on at least one peripheral portion around the center hole C. [

In one embodiment of the present invention, the rods 520 are formed of four pieces, and may be disposed at the same intervals and corresponding positions with respect to the center hole C. The elastic member 510 may be disposed on the outer surface of the rod 520 so as to penetrate the base 100 or the second fluid portion 300 so that the elasticity of the elastic member 510 in the direction of the optical axis O of the second fluid portion 300, It can guide the movement. However, the present invention is not limited to the number and arrangement of the above-described rods 520 according to one embodiment, and may be provided in various numbers or may be arranged at various positions necessary to prevent hand tremor that the present invention intends to achieve.

The camera lens module 10 included in the electronic device 1 according to the embodiment of the present invention is constructed so that the gap between the magnet 220 and the yoke 310 can be varied to save the number of parts, Driving lock is implemented and at the same time an appropriate shaking motion is controlled according to the shooting situation, thereby reducing the parts cost and slimming the electronic device.

In addition, the camera lens module 10 of the present invention can greatly improve the correction of the shaking motion through the interaction between the first and second fluid dynamic sections 200 and 300. Generally, the magnets 220 mounted on the first moving part 200 and the yokes 310 mounted on the second moving part 300 are assembled in opposite positions and a magnetic attracting force is applied to each other. Generally, the lens assembly 210 and the second fluid part 300 are brought into close contact with each other by using the attraction force between the magnet 220 and the yoke 310, and when the driving power is cut off, Aligning the center with the center of the yoke 310 to return the lens assembly 210 to its home position. However, according to the embodiment of the camera lens module 10 of the present invention, the gap between the magnet 220 and the yoke 310 in the direction of the optical axis O, as well as the relationship between the general magnet 220 and the yoke 310, (g), it is possible to change the amount of camera shake correction through the correction angle enlargement. For example, by varying the gap g between the magnet 220 and the yoke 310, the resonance frequency f generated through the interaction between the magnet 220 and the yoke 310 can be varied , The attraction force (A), the restoring force (R), and the DC sensitivity (D) associated therewith can be controlled. Each of these terms is the frequency and forces associated with magnifying the correction of the shake correction angle. Hereinafter, a description will be given of the attraction force (A), the restoring force (R), the resonance frequency (f) and the DC sensitivity (D), and the process of adjusting the camera shake correction angle by controlling the frequencies and forces generated.

5 is a schematic view showing a correlation between a magnet and a yoke in a camera lens module according to an embodiment of the present invention.

5 (a) schematically shows the attraction force A generated between the magnets 220 and the yoke 310, and FIG. 5 (b) shows the restoring force R generated between the magnets 220 and the yokes 310 ).

The prior art has used a fixed design of the clearance g between the magnet 220 and the yoke 310 to only return the magnet 220 and the yoke 310 to the fixed position due to power interruption. However, according to the present invention, the clearance g between the magnet 220 and the yoke 310 can be adjusted to adjust the forces due to the interaction between the magnet 220 and the yoke 310, It can be used for control.

Referring to FIG. 5A, the attraction force A generated between the magnet 220 and the yoke 310, for example, the yoke 310, is a force that pulls the magnet 220 toward the yoke 310 . ≪ / RTI > The magnets 220 and the yokes 310 are mutually attracted to each other so that the first and second moving parts 200 and 300 having the magnets 220 mounted thereon and the second moving parts 300, Relational movements can occur. Since the first fluid unit 200 can move in a plane perpendicular to the optical axis O (e.g., in the X and Y directions), the second fluid unit 300 does not move in the direction of the optical axis O It can be driven by the attraction force (A). 5 (a), when the yoke 310 is moved to the magnet 220, the attracting force A is increased, and when the yoke 310 moves toward the side away from the magnet 220, ) Can be reduced.

Referring to FIG. 5B, the restoring force R generated between the magnet 220 and the yoke 310, for example, the force of returning the magnet 220 to its initial position before movement is shown. When the magnet 220 moves on a plane perpendicular to the optical axis O by the VCM driving force D generated by the interaction between the magnet 220 and the driving coil 410, The center of the magnet 220 moves toward the center of the yoke 310. This is called the restoring force (R).

The attraction force A and the restoring force R are forces interacting with the camera shake correction angle and the smaller the attraction force A and the restoring force R are, the smaller the resonance frequency f is. .

Hereinafter, the resonance frequency f refers to a frequency generated in the object when resonance occurs, and the following equation for the resonance frequency f is shown.

f is the resonance frequency

k is a spring constant

m is the mass of the moving object

DELTA F is the change amount of the restoring force

? X is the displacement amount

Referring to Equation (1), it can be seen that the resonant frequency f is determined by the mass of the moving part as a whole and the restoring force (R). The resonance frequency f is determined by the spring constant k when the mass of the moving object moved by the VCM driving force is fixed and the resonance frequency f is increased as the spring constant k is larger, As the value of the spring constant (k) becomes smaller, the resonance frequency f becomes lower.

The spring constant k can control the resonance frequency f according to the change amount of the restoring force R in accordance with the change in the restoring force R. [

In the present invention, the moving object is set as the second fluid unit 300, and the mass of the second fluid unit 300 is fixed, so that the resonance frequency f is determined by the k value. The resonance frequency f can be varied according to the amount of change of the restoring force R between the magnet 220 and the yoke 310 because k is proportional to the restoring force R. [

DC Sensitivity (D) is inversely proportional to the spring constant (k), and the unit is [mm / V]. The higher the DC sensitivity (D), the more the camera shake drive device corresponding to the larger shake correction amount can be driven.

6 is a top view of a camera lens module illustrating a deflection amount of a camera lens module by gravity according to an embodiment of the present invention.

Referring to FIG. 6, when the camera lens module 10 is installed in the direction of gravity, deflection may occur due to gravity.

Correction of the deflection X due to gravity generated in the camera lens module 10 can produce the same effect as using a separate camera-shake locking structure, and it is necessary to examine forces related to the deflection amount X .

The equation of deflection (X) due to gravity is as follows.

x is the deflection due to gravity

f is the resonance frequency

Referring to Equation (2), it can be confirmed that deflection amount X is inversely proportional to resonance frequency f. For example, by increasing the resonance frequency f, the gravitational deflection X generated in the camera lens module 10 can be reduced. This means that the equivalent design is implemented without using the hand-held locking structure separately provided in the prior art, and moreover, the power for moving the components of the camera lens module 10 moved by the gravity back to the correct position is consumed It is possible to have a consumption saving effect that does not occur. In addition, since the shaking amount due to the external impact is reduced, the noise generated in the camera lens module 10 is remarkably reduced and the fear of damage is reduced.

Therefore, according to the embodiment of the present invention, when the camera lens module 10 is designed, the deflection amount X of the gravity can be minimized by adjusting the resonance frequency f, It can be seen that the shaking lock can be implemented.

7 is a cross-sectional view illustrating a camera lens module in which a yoke moves close to a magnet according to an embodiment of the present invention. 8 is a cross-sectional view illustrating a camera lens module in which a yoke moves away from a magnet according to an embodiment of the present invention.

Referring to FIGS. 7 and 8, as the second moving unit 300 mounted with the yoke 310 moves in the optical axis O direction by driving the driving unit 500, the yoke 310 and the magnet 220 Can be controlled by controlling the gap g.

First, when the second fluid unit 300 with the yoke 310 mounted thereon is moved in the upward direction of the optical axis O, the second fluid unit 300 with the yoke 310 mounted thereon and the magnet 220 mounted thereon The gap g with respect to the first flow portion 200 can be minimized. Here, the elastic member 510 may be disposed so that the yoke 310 and the magnet 220 can maintain the minimum clearance g.

The gap g between the yoke 310 and the magnet 220 is minimized and the attraction force A and the resonance frequency f described above are minimized when the yoke 310 moves closest to the magnet 220 . The DC sensitivity (D) can be lowest. Further, the compression amount of the elastic member 510 becomes the maximum, and the restoring force R can act in the direction opposite to the attraction force A.

When the second fluid unit 300 mounted with the yoke 310 moves in the downward direction of the optical axis O, the second fluid unit 300 with the yoke 310 and the second fluid unit 300 with the magnet 220 mounted thereon The gap g with respect to the first moving part 200 can be maximized. Here, the elastic member 510 may be disposed so that the yoke 310 and the magnet 220 can maintain the maximum gap g.

The gap g between the yoke 310 and the magnet 220 is maximized and the attracting force A and the resonance frequency f described above are maximized when the yoke 310 is moved farthest to the magnet 220 . The DC sensitivity (D) can be the highest. Further, the amount of compression of the elastic member 510 is minimized, and the restoring force R can act in a direction opposite to the attraction force A.

The attraction force A between the magnets 220 and the yoke 310 and the restoring force R of the elastic member 510 are designed to be similar to each other to balance the forces therebetween, 2 moving unit 300 can be precisely and smoothly performed.

The camera lens module 10 according to the present invention can control the gap g between the magnet 220 and the yoke 310 through the movement of the second moving part 300 in the optical axis O direction have. The resonance frequency f, the attraction force A, the restoring force R and the DC sensitivity D can be controlled according to the size of the gap g, and the camera shake correction angle associated therewith can be adjusted Possible implementation of an electronic device is possible.

9 is a graph illustrating the characteristics of the shaking motion according to the gap between the magnet and the yoke according to the embodiment of the present invention.

9A is a graph showing changes in the resonance frequency f and the DC sensitivity D according to the variable gap g between the magnet 220 and the yoke 310. FIG.

The graph shows that as the gap g between the magnet 220 and the yoke 310 increases, the magnitude of the resonance frequency f decreases and the DC sensitivity D increases. Conversely, as the gap g between the magnet 220 and the yoke 310 becomes smaller, the magnitude of the resonance frequency f increases and the DC sensitivity D decreases. This can be also explained by the above equation. The camera lens module 10 having the variable gap g is used to control the resonance frequency f and the DC sensitivity D, An image stabilization function can be implemented.

9B is a graph showing a change amount of the attraction force A and the deflection amount X in accordance with the variable gap g between the magnet 220 and the yoke 310. FIG.

It can be seen from the graph that as the gap g between the magnet 220 and the yoke 310 increases, the magnitude of the attraction force A decreases and the amount of deflection X increases. Conversely, as the gap g between the magnet 220 and the yoke 310 becomes smaller, the magnitude of the attraction force A increases and the deflection amount X decreases. This can be also explained by the above equation, and an excellent camera shake prevention function can be realized in photographing a subject by using the camera lens module 10 having the variable gap g.

Hereinafter, as the gap g varies, the camera lens module 10 can cope with the camera shake which is changed according to the photographing situation, for example, the state of each photographing mode such as still image / moving image in real time The effect of which is explained.

10 is a cross-sectional view illustrating a position of a yoke for realizing camera-shake locking of a camera lens module according to an embodiment of the present invention. 11 is a cross-sectional view illustrating a position of a yoke for camera-shake still image pickup of a camera lens module according to an embodiment of the present invention. 12 is a cross-sectional view illustrating the position of a yoke for photographing a shaking motion of a camera lens module according to an embodiment of the present invention.

Referring to FIG. 10, there is shown a camera lens module 10 for implementing an OIS Locking function, without a separate additional electronic device. As described above, the deflection amount X is inversely proportional to the resonance frequency f in Expression (2). Therefore, it is necessary to increase the resonance frequency (f) in order to minimize the deflection amount (X).

The distance between the magnet 220 and the yoke 310 may be set to a minimum gap g by moving the second moving part 300 mounted on the yoke 310 in the direction of the optical axis O have. The gap g is minimized by driving the driving unit 500 to raise the yoke 310 close to the magnet 220 within a range allowed by the elastic member 510 so that the resonance frequency f is maximized The deflection amount (X) can be reduced to the maximum value. In the embodiment of the present invention, the deflection amount X is reduced to 0.1 mm or less at a resonance frequency f of 50 Hz or more.

An invention capable of OIS locking can be realized by reducing the deflection amount X due to gravity by varying the gap g between the magnet 220 and the yoke 310 of the camera lens module 10 Can be made. Further, unlike the conventional case, unlike the prior art, when the locking mode is entered, the power is not consumed to maintain the center of the camera shake driving device and the high restoring force (R) is applied. There is an effect that the possibility of occurrence or breakage is very low.

Referring to FIG. 11, a camera lens module 10 for implementing a camera-shake drive device function when photographing a still image is shown. When the resonance frequency f is excessively high (see FIG. 9), there is a problem that the DC sensitivity D rapidly decreases, and therefore, a movement amount for correcting the camera shake correction angle required by the optical device can not be implemented . Therefore, the present invention solves the above problem by adjusting the resonance frequency f and setting the required DC sensitivity D.

For example, the gap g of the yoke 310 with respect to the magnet 220 can be adjusted in a direction to increase the gap g as compared with the gap g implemented in the camera-shake locking. As the gap g increases, the resonance frequency f becomes lower and the DC sensitivity D becomes higher, so that the image can be captured without shaking through normal shaking motion.

Referring to FIG. 12, a camera lens module 10 for implementing a camera-shake drive device function when capturing a moving image is shown.

A hand holding the camera during movement (for example, walking or stair climbing) during a user's photographing may occur frequently. In this case, a larger shaking motion may occur than when a still image is shot. In order to compensate for the larger camera shake, a larger camera shake correction amount is required.

9, the resonance frequency f decreases and the DC sensitivity D increases as the gap g between the magnet 220 and the yoke 310 increases. Therefore, at the time of capturing a moving image in which the DC sensitivity D is required to be increased more than that at the time of still photographing, the gap g may be maximized to increase the DC sensitivity D to the maximum. Therefore, even in the case of capturing a screen while moving, it is possible to obtain an image without blur according to the present invention.

In addition, when it is necessary to cope with the change of the shaking motion correction amount in various situations, the camera lens module 10 can be advantageously applied while varying the gap g.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be apparent to those of ordinary skill in the art.

Electronic devices: 1
Camera lens module: 10
Base: 100
First fluid section: 200
Second fluid section: 300
Cover part: 400
Driving part: 500
Lens assembly: 210
Magnets: 220
York: 310
Driving coil: 410
Flexible circuit board: 420
Elastic member: 510
Optical axis: O
Resonant frequency: f
Center hole: C

Claims (19)

A camera lens module comprising:
Base;
A first fluid chamber for receiving the lens assembly and coupled to the base to flow in a plane perpendicular to an optical axis of the lens assembly; And
And a second flow portion disposed below the base and moving in the optical axis direction of the lens assembly,
And the second flow portion forms a variable gap between the first fluid portion and the second fluid portion through the movement.
The method according to claim 1,
At least one magnet mounted on one of the base and the first fluid passage; And
Further comprising at least one yoke disposed to correspond to the magnet and mounted to the second fluid portion,
Wherein the magnet and the yoke generate the magnetic force in the direction of the optical axis between the second fluid portion and the base.
3. The method of claim 2,
Further comprising a driving unit disposed on one side of the base or the second fluid part for moving the second fluid part in the optical axis direction.
The method of claim 3,
By the driving of the driving unit, the optical axis direction back and forth movement of the second flow portion,
Wherein the gap between the first fluid unit and the second fluid unit is varied to change the resonance frequency between the first fluid unit and the second fluid unit.
5. The method of claim 4,
And a cover portion disposed on the first fluid portion and covering the upper side of the first fluid portion,
Wherein the cover portion mounts at least one drive coil arranged to face the magnet.
6. The method of claim 5,
Wherein at least two pairs of magnets are arranged symmetrically with respect to the optical axis.
The method according to claim 6,
Wherein the at least one drive coil and the at least one magnet are disposed to face each other and generate a driving force by which the first flow portion can flow by the interaction of the coil and the magnet.
5. The method of claim 4,
Wherein the attracting force of the magnet and the yoke is variable according to a variation of a gap between the magnet and the yoke.
5. The method of claim 4,
Wherein the DC sensitivity of the magnet and the yoke is variable according to a variation of the gap between the magnet and the yoke.
5. The method of claim 4,
Wherein an amount of deflection of the camera lens module due to gravity is variable according to a variation of the gap between the magnet and the yoke.
6. The method of claim 5,
The second flow portion has at least one yoke groove for receiving at least one yoke,
And the center of the yoke, the magnet, and the coil are arranged on the same line.
12. The method of claim 11,
Wherein the yoke groove includes a yoke hole in the center of the yoke groove to generate an interaction between the yoke and the magnet when the yoke is seated.
12. The method of claim 11,
Wherein the base includes a guide hole for guiding the yoke mounted in the yoke groove of the second flow portion to move in the optical axis direction.
14. The method of claim 13,
Wherein the guide hole is formed to be larger than the yoke groove so as to secure a space in which the yoke groove can move left and right.
6. The method of claim 5,
And at least one rod disposed to pass through the base,
Wherein the at least one rod guides the second flow portion moving in the optical axis direction.
16. The method of claim 15,
Further comprising an elastic member disposed on the outer surface of the rod and configured to set a range of a gap that varies between the magnet and the yoke as the second flow portion moves.
6. The method of claim 5,
And a flexible circuit board provided on the cover to electrically connect to the driving unit and to supply power.
5. The method of claim 4,
Wherein the base, the first fluid flow portion, and the second flow portion are arranged in parallel along a side surface of the lens assembly.
A camera lens module comprising:
Base;
At least one magnet that flows in a plane perpendicular to the optical axis of the lens assembly; And
And at least one yoke disposed to face the lower portion of the magnet and moving in the optical axis direction of the lens assembly,
Wherein the yoke forms a variable gap between the magnet and the yoke through the movement.

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